Unlock instant, AI-driven research and patent intelligence for your innovation.

A light emitting device

a light emitting device and light guide technology, applied in the direction of planar/plate-like light guides, instruments, mechanical devices, etc., can solve the problems of the light guide's intensity gain and thus the light emitting device's intensity loss, and achieve the effects of reducing light loss, improving scalability, and high intensity outpu

Active Publication Date: 2017-01-26
SIGNIFY HLDG BV
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to improve the scalability of light emitting devices by combining light in different directions. It also enhances high intensity output and reduces light losses, even in devices with long and wide light guides.

Problems solved by technology

However, as a result of self-absorption in the luminescent material as well as increased light outcoupling due to the LEDs, the larger, and particularly the longer, the light guide is, the more light will be lost, which in turn leads to a decrease in the intensity gain of the light emitted by the light guide and thus the light emitting device.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A light emitting device
  • A light emitting device
  • A light emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053]The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and fully convey the scope of the invention to the skilled person.

[0054]The following description will start with general considerations regarding applications, suitable light sources and suitable materials for various elements and features of a light emitting device according to the invention. For this purpose a number of features and elements which may be added to any one of the embodiments of a light emitting device according to the invention as set forth further below will be described with reference to FIGS. 1, 2A and 2B. The specific embodiments of a light emitting device according ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A light emitting device (1) comprising a plurality of first light sources (21, 22, 23, 24, 25, 26, 27, 28) adapted for, in operation, emitting first light (13) with a first spectral distribution, and a first light guide (3) comprising a first light input surface (31, the first light guide being adapted for receiving the first light with the first spectral distribution at the first light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, and guiding the second light to the first light input surface, the light emitting device further comprising one first light out-coupling element (9, 91, 92) for coupling light out of the first light input surface, the first light out-coupling element being arranged in or on the first light input surface at a pre-selected location on a plane in which the first light input surface extends.

Description

FIELD OF THE INVENTION[0001]The invention relates to a light emitting device having a plurality of light sources and a light guide. The invention further relates to a lamp, a luminaire or a lighting system comprising such a light emitting device.BACKGROUND OF THE INVENTION[0002]High intensity light sources, and particularly white high intensity light sources, are interesting for various applications including spots, stage-lighting, automotive lighting and digital light projection. For such purposes, it is possible to make use of so-called light concentrators where short wavelength light is converted to longer wavelengths in a highly transparent luminescent material. Such a transparent luminescent material is illuminated by LEDs to produce longer wavelengths within the luminescent material. Converted light, which will be waveguided in the luminescent material, is extracted from a surface leading to an intensity gain and thus brightness gain.[0003]Document WO 2012 / 056382 A1 describes ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F21V8/00
CPCG02B6/0076G02B6/0055G02B6/0016G02B6/0085G02B6/0068G02B6/0003G02B6/0035G02B6/0063G02B6/0073H01L25/0753H01L33/504H01L33/505H01L33/58H01L2924/0002H01L2924/00
Inventor VAN BOMMEL, TIESHIKMET, RIFAT ATA MUSTAFA
Owner SIGNIFY HLDG BV